search icon

Cross Connection Control

What is “Cross Connection Control”?

Also called “backflow prevention,” cross connection control is not only about keeping the water that comes out of your tap safe and clean, but also about keeping the public water supply protected from contaminants and hazards that may be present in certain buildings.

Imagine our water system as a big network of pipes, delivering fresh water to homes and businesses. Sometimes, unexpected events such as a water main break or a malfunctioning boiler can cause pressure changes in the pipes. This can lead to higher pressure than that in the water mains, resulting in water flowing backward. This is called "backflow." When backflow happens, contaminated water can mix with the clean water supply.

That's where our Cross Connection Control Program comes in, regulating where and how these devices should be set up, and how frequently they should be tested.

  • Backflow Prevention Devices:  Customers may be required to install specific types of testable backflow devices on their connection to our water system that allows water to flow in only one direction. If the water tries to flow backward, these devices are designed to block it.
  • Regular Checks: Backflow prevention devices must be regularly tested and maintained by a certified backflow tester to make sure they're working as designed.
  • Community Involvement:  We also work with homeowners and businesses to help them understand backflow prevention, and provide resources for them if they need to  install their own backflow prevention devices.

Program Requirements

The Colorado Department of Public Health and Safety mandates that water suppliers conduct onsite inspections of specific types of connections to their systems. They must ensure proper backflow prevention is in place to protect the public drinking water from potential hazards.

Additionally, building codes require the installation of testable backflow prevention devices in locations where risks exist. This includes boilers and fire suppression systems, regardless of whether they're located in large commercial buildings or certain single-family homes.

What Requires Backflow Prevention Devices?

  • All commercial properties
  • Non-single family residential properties (Multi-hab buildings with three (3) or more residences)
  • Industrial & institutional properties 
  • Irrigation connections 
  • Certain Single-Family residences that contain hazards or contaminants. 

Backflow Assembly Annual Testing

Once installed, these assemblies must be tested annually by a certified backflow tester to ensure that they are working properly, and a test report must be submitted to Failing to comply with required testing can result in termination of service.

Backflow testers may use their own forms to submit reports, but we provide a sample form here as a courtesy to ensure all required information is provided on the submitted report.

footer shape